IRGen: Fix assertion failure with typed throws #80273
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The mapTypeIntoContext() call in visitFullApplySite() was not necessary. The type in question is already fully substituted and should no longer contain type parameters. However, it can contain archetypes, which is what caused mapTypeIntoContext() to assert. Indeed, this case where the return type is generic but still loadable wasn't covered by our test suite. - Fixes swiftlang#80020. - Fixes rdar://147051717.
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@swift-ci Please smoke test |
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CC @drexin |
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This fixes a regression from f6e7c16. The mapTypeIntoContext() call in visitFullApplySite() was not necessary because the type in question is already fully substituted and should no longer contain type parameters.
However, it can contain archetypes, which is what caused mapTypeIntoContext() to assert. Indeed, this case where the return type is generic but still loadable wasn't covered by our test suite.
(I believe the other places where mapTypeIntoContext() was introduced in that commit are correct, because there we're dealing with the interface type of the current function, which can contain type parameters.)